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Simple Compressor class (C++)

Type : stereo, feed-forward, peak compressor
References : Posted by Citizen Chunk
Linked file : http://www.chunkware.com/opensource/SimpleComp.zip

Notes :
Everyone seems to want to make their own compressor plugin these days, but very few know where to start. After replying to so many questions on the KVR Dev Forum, I figured I might as well just post some ready-to-use C++ source code.

This is a C++ implementation of a simple, stereo, peak compressor. It uses a feed-forward topology, detecting the sidechain level pre-gain reduction. The sidechain detects the rectified peak level, with stereo linking to preserve imaging. The attack/release uses the EnvelopeDetector class (posted in the Analysis section).

Notes:
- Make sure to call initRuntime() before processing starts (i.e. call it in resume()).
- The process function takes a stereo input.
- VST params must be mapped to a practical range when setting compressor parameters. (i.e. don't try setAttack( 0.f ).)

(see linked files)





Comments


Added on : 25/11/05 by tl_163[ AT ]hotmail[ DOT ]com
Comment :
This code works perfectly, and I have tried a number of sound and each worked correctly. The conversion is linear in logarithm domain.

The code has been written in such a professional style, can not believe it is FREE!!

Keep it up. Two super huge thumbs up.

Ting




Added on : 09/12/05 by scuzzphut[ AT ]gmail[ DOT ]com
Comment :
source file seems to be down :-(
anyone have a local copy ???              




Added on : 07/02/06 by citizenchunk[ at ]chunkware[ dot ]com
Comment :
there are some updates: mainly, there is now a SimpleGate class, which implements a simple gate. other than that, minor changes to the code -- but all public functions should work the same.

*** NEW FILE NAME: http://www.chunkware.com/opensource/SimpleCompGate.zip




Added on : 28/02/06 by jinjing20012001[ AT ]yahoo[ DOT ]com
Comment :
hello everybady!
I am a Chinese student, I want to download the code from http://www.chunkware.com/opensource/SimpleCompGate.zip  but because  the server can not do his job well,I have no chance to download the code.I really hope kind people who have been have the code can tansfer a copy to me!I will be appreciated very much.
my emial is listed as following:
jinjing20012001@yahoo.com
I am looking for your reply as soon as possible.
    




Added on : 08/05/06 by citizenchunk[ at ]chunkware[ DOT ]com
Comment :
sorry about the link. the new source is at
http://www.chunkware.com/downloads/simpleSource.zip




Added on : 12/03/08 by ben[ AT ]benvesco[ DOT ]com
Comment :
MIRROR: http://www.benvesco.com/dump/simpleSource.zip

This code has been missing for some time at the posted locations. I found someone with a copy and am now mirroring these files for download on my server. I believe the software license allows this mirroring. The code is unchanged and belongs to the original owner.




Added on : 15/08/11 by jed_hubic[ AT ]yahoo[ DOT ]com
Comment :
Thank you Ben! This help me wrap my head around DSP a bit more. It's a shame this site is essentially dead...              



Added on : 15/04/12 by thewjew[ AT ]gmail[ DOT ]com
Comment :
            is this code still available?  



Added on : 23/04/12 by christian[ DOT ]schragen[ AT ]gmail[ DOT ]com
Comment :
I'm new in programming. how do I embed this code to my project? vst sdk is already loaded from the steinberg developer site. can somebody give me a step by step guide?



Added on : 24/05/13 by jamie[ AT ]jamiebullock[ DOT ]com
Comment :
It loos like the Chunkware code can now be found on GitHub: https://github.com/music-dsp-collection/chunkware-simple-dynamics/tree/master/simpleSource



Added on : 29/01/14 by mike[ AT ]mikegazzaruso[ DOT ]com
Comment :
              Hi, may i know the range of values to set in SimpleComp? Expecially those for Threshold and Ratio. I set them to 2 and -30 but my sound get incredibly distorted after that. Thanks.



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